[DeTomaso] Pedal Casting?

Julian Kift julian_kift at hotmail.com
Sun Apr 2 16:40:57 EDT 2017


When I replaced the pedal assembly in my first GT40, Tilton had an online submission form for master cylinder sizing, input all the basic on the vehicle and  brakes and they would come back with a recommendation. I cannot see that option on their website currently, so maybe the lawyers got hold of them, but worth contacting Tech Support to see if they still offer such a service.


I used Tilton's advise as more of a verification for the attached spreadsheet to help me size dual masters, it is by no means exhaustive but may serve as something you can build upon. I set it up all metric, but just added Imperial calculations for the die-hards and Americans!


Julian

________________________________
From: DeTomaso <detomaso-bounces at server.detomasolist.com> on behalf of Ken Green via DeTomaso <detomaso at server.detomasolist.com>
Sent: Saturday, April 1, 2017 10:22 PM
To: mark skwarek; L GRAY; Dave Londry
Cc: detomaso at server.detomasolist.com
Subject: Re: [DeTomaso] Pedal Casting?

Mark,
I think the MC size depends on the caliper pistons.
Ken

      From: mark skwarek via DeTomaso <detomaso at server.detomasolist.com>
 To: Ken Green <kenn_green at yahoo.com>; L GRAY <tipo874a at msn.com>; Dave Londry <davel at emspace.com>
Cc: "detomaso at server.detomasolist.com" <detomaso at server.detomasolist.com>
 Sent: Saturday, April 1, 2017 8:13 PM
 Subject: Re: [DeTomaso] Pedal Casting?

  Ken,
  I'll send you the What I am using for master cylinder sizes. I talked
  to the guys a Tilton and they were very helpful.
  Mark
  On Saturday, April 1, 2017 10:34 PM, Ken Green <kenn_green at yahoo.com>
  wrote:
  I know about the pedal ratios, I didn't want to dent the wall of the
  front trunk to make room for clutch MC.
  Also, the ratio of MC bores to caliper piston areas is part of the
  equation.  It looks like 0.75 MCs and the fairly large Porsche 996
  Turbo caliper pistons I am using come out about right.
  Ken
    __________________________________________________________________

  From: mark skwarek <ehpantera at yahoo.com>
  To: Ken Green <kenn_green at yahoo.com>; L GRAY <tipo874a at msn.com>; Dave
  Londry <davel at emspace.com>
  Cc: "detomaso at server.detomasolist.com"
  <detomaso at server.detomasolist.com>
  Sent: Saturday, April 1, 2017 12:10 PM
  Subject: Re: [DeTomaso] Pedal Casting?
  If you are converting the stock pedal assembly to non vacuum assisted,
  the pedal effort will increase. Willwood manual pedal assy. is 6:1 and
  power brakes are between 5:1 and 4:1.
  Mark
  On Thursday, March 30, 2017 6:33 PM, Ken Green via DeTomaso
  <detomaso at server.detomasolist.com> wrote:
    Hi Les,
        Any idea what you would want for the pedal assembly casting?
        I used a Tilton 7/16 balance bar on the prototype, and it placed
    the MC shafts where some of the webbing is on the pedal side, so I
  had
    to cut into the webbing.  I found a 1/2 inch Tilton balance bar and
  it
    is wider, so I can avoid the webbing.  I did basically the same as
    Goran did before me (see attachment).  I like this a lot better than
    something that is in front of the casting, I think Dennis Quela has
    something like that.
    So you are back in California?
      Inline image
    Inline image
    Inline image
    Inline image
    Inline image
    Inline image
    Inline image
    Inline image
    Inline image
    Inline image
      __________________________________________________________________
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References

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  2. http://server.detomasolist.com/mailman/listinfo/detomaso
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-------------- next part --------------
   When I replaced the pedal assembly in my first GT40, Tilton had an
   online submission form for master cylinder sizing, input all the basic
   on the vehicle and  brakes and they would come back with a
   recommendation. I cannot see that option on their website currently, so
   maybe the lawyers got hold of them, but worth contacting Tech Support
   to see if they still offer such a service.

   I used Tilton's advise as more of a verification for the attached
   spreadsheet to help me size dual masters, it is by no means exhaustive
   but may serve as something you can build upon. I set it up all metric,
   but just added Imperial calculations for the die-hards and Americans!

   Julian
     __________________________________________________________________

   From: DeTomaso <detomaso-bounces at server.detomasolist.com> on behalf of
   Ken Green via DeTomaso <detomaso at server.detomasolist.com>
   Sent: Saturday, April 1, 2017 10:22 PM
   To: mark skwarek; L GRAY; Dave Londry
   Cc: detomaso at server.detomasolist.com
   Subject: Re: [DeTomaso] Pedal Casting?

   Mark,
   I think the MC size depends on the caliper pistons.
   Ken
         From: mark skwarek via DeTomaso
   <detomaso at server.detomasolist.com>
    To: Ken Green <kenn_green at yahoo.com>; L GRAY <tipo874a at msn.com>; Dave
   Londry <davel at emspace.com>
   Cc: "detomaso at server.detomasolist.com"
   <detomaso at server.detomasolist.com>
    Sent: Saturday, April 1, 2017 8:13 PM
    Subject: Re: [DeTomaso] Pedal Casting?

     Ken,
     I'll send you the What I am using for master cylinder sizes. I talked
     to the guys a Tilton and they were very helpful.
     Mark
     On Saturday, April 1, 2017 10:34 PM, Ken Green <kenn_green at yahoo.com>
     wrote:
     I know about the pedal ratios, I didn't want to dent the wall of the
     front trunk to make room for clutch MC.
     Also, the ratio of MC bores to caliper piston areas is part of the
     equation.  It looks like 0.75 MCs and the fairly large Porsche 996
     Turbo caliper pistons I am using come out about right.
     Ken
       __________________________________________________________________
     From: mark skwarek <ehpantera at yahoo.com>
     To: Ken Green <kenn_green at yahoo.com>; L GRAY <tipo874a at msn.com>; Dave
     Londry <davel at emspace.com>
     Cc: "detomaso at server.detomasolist.com"
     <detomaso at server.detomasolist.com>
     Sent: Saturday, April 1, 2017 12:10 PM
     Subject: Re: [DeTomaso] Pedal Casting?
     If you are converting the stock pedal assembly to non vacuum
   assisted,
     the pedal effort will increase. Willwood manual pedal assy. is 6:1
   and
     power brakes are between 5:1 and 4:1.
     Mark
     On Thursday, March 30, 2017 6:33 PM, Ken Green via DeTomaso
     <detomaso at server.detomasolist.com> wrote:
       Hi Les,
           Any idea what you would want for the pedal assembly casting?
           I used a Tilton 7/16 balance bar on the prototype, and it
   placed
       the MC shafts where some of the webbing is on the pedal side, so I
     had
       to cut into the webbing.  I found a 1/2 inch Tilton balance bar and
     it
       is wider, so I can avoid the webbing.  I did basically the same as
       Goran did before me (see attachment).  I like this a lot better
   than
       something that is in front of the casting, I think Dennis Quela has
       something like that.
       So you are back in California?
         Inline image
       Inline image
       Inline image
       Inline image
       Inline image
       Inline image
       Inline image
       Inline image
       Inline image
       Inline image

   __________________________________________________________________
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     list. They also grant the list owner permission to maintain an
   archive
     or approve the archiving of list messages.
   References
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   Members who post to this list grant license to the list to forward any
   message posted here to all past, current, or future members of the
   list. They also grant the list owner permission to maintain an archive
   or approve the archiving of list messages.

References

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